Product Description Material Made of Zinc Alloy of high quality, hardness; high and resistance perfect wear, standard internal hex socket, burr-free, smooth, anti-slip. Quantity; & amp; amp; Accessory Screw & agrave; hexagon Nuts: M4 * 10 M5 * 10 — 30 Pieces & agrave; Each M6 * 10 — 20 Pieces M6 * 15 M6 * 17 — 15 Pieces & agrave; Each M6 * 20 M8 * 15 M8 * 20 - 10 Pieces M8 * 25 — 5 Pieces M4 key; Hexagonal Allen-Diameter: 4.0mm Length: 22 * 66mm M5 wrench; Hexagonal Allen-Diameter: 5.0mm Length: 26 * 76mm M6 wrench; Hexagonal Allen-Diameter: 6.0mm Length: 32 * 85mm M8 wrench; Hexagonal Allen-Diameter: 8.0mm Length: 40 * 100mm How to Use Pre-drill, drill a well-sized hole. first with tools, when the material is high hardness, enlarge the hole please. Use the proper internal hex tool. to screw. Tip: You can use the vise or clip to tighten both sides while inserting the nuts. the wooden plank, which can effectively reduce cracking. Application Appropriate; softwoods of pine,